Warehousing - method and a distributed computer - database system for the warehousing

摘要

An information obtaining a direction for the processing of a query for the recovery of information from a database has a mechanism for finding a number of features and feature fragments in a index data bank; an evaluation mechanism for the identification of a number of converting means rewrites subqueries prefaced by a number of planes which are contained in the query, and for the recursive the evaluation of the under query with the use of the individual found features and feature fragments; and a mechanism for collecting and storing a number of results of the recursive the evaluation of the query and the converting means rewrites subqueries after the calculation of an overall result, the query. Such a system can the need for conventional again obtaining systems for the creation of new, separate, centralized replicas within the data warehouse of the data, which in the various external databases are stored, eliminate. The invention, therefore, the problems of the replication of such data in conventional systems in which the data may be obsolete can be subject to errors which, during the replication for the data are bearing posture. Instead, the data warehouse an index data bank, which stores entries, which data with respect to the information stored in the external databases to be made available, such as, for example, information position identifier for these data within the databases, relational information and statistics. The present invention also, a robust, versatile indexing system before.